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Table 1 Physical characteristics for all subjects

From: Influence of maturation on anthropometry and body composition in Japanese junior high school students

 

Boys (n = 245)

Girls (n = 207)

 

12.0 to 12.99 years

13.0 to 13.99 years

14.0 to 14.99 years

12.0 to 12.99 years

13.0 to 13.99 years

14.0 to 14.99 years

 

(n = 32)

(n = 129)

(n = 84)

(n = 24)

(n = 117)

(n = 66)

Age (years)

12.6 ± 2.2

13.4 ± 0.3

14.4 ± 0.3

12.7 ± 0.2

13.4 ± 0.3

14.4 ± 0.2

Height (cm)

152.5 ± 6.3

157.8 ± 9.4

165 ± 6.3

152.7 ± 7.4

154.5 ± 5.2

155.5 ± 4.8

Weight (kg)

42.0 ± 6.1

48.2 ± 9.4

54.5 ± 7.7

45.0 ± 8.0

45.4 ± 5.7

48.1 ± 5.3

BMI (kg/m2)

18.0 ± 1.9

19.2 ± 2.6

19.9 ± 2.0

19.2 ± 2.5

19.0 ± 2.0

21.0 ± 3.4

% Fat (%)

14.8 ± 5.8

16.7 ± 7.9

16.7 ± 5.4

24.8 ± 6.8

24.4 ± 5.5

30.1 ± 6.3

LBM (kg)

35.5 ± 3.8

39.7 ± 5.4

45.1 ± 4.4

33.5 ± 4.3

34.1 ± 3.1

34.8 ± 4.5

Number of subjects in each stage of PH

PH1

7

11

0

0

6

0

PH2

13

35

5

5

6

0

PH3

3

19

8

3

24

11

PH4

3

24

28

11

42

26

PH5

1

25

20

2

18

16

No answer

5

15

23

3

21

13

PH

2.2 ± 1.1

3.1 ± 1.3

4.0 ± 0.9

3.5 ± 1.1

3.6 ± 1.1

4.1 ± 0.7

  1. Values are expressed as mean ± SD. Age, chronological age; BMI, body mass index;% Fat, percent body fat; LBM, lean body mass; PH, stage of pubic hair development.